Jtekt Corporation

Boyko Stoimenov

Kiyoshi Tanimoto

A bearing apparatus includes a bearing portion having an outer ring, an inner ring, a plurality of balls interposed between the outer ring and the inner ring, and a cage that holds the balls, and a lubrication unit provided adjacently to the bearing portion in an axial direction thereof to feed lubricant to a lubrication area that needs to be lubricated. The lubrication unit has a tank that stores the lubricant, and a pump that ejects the lubricant toward the lubrication area. The pump has an ejection port that is open toward the lubrication area and through which the lubricant is ejected at a predetermined initial velocity in the form of a 0.5 to 1,000 picoliter oil droplet.

Bearing apparatus and lubrication unit

A rolling bearing apparatus includes: a bearing including an inner ring, an outer ring, a plurality of balls, and a cage; and an oil supply unit provided axially adjacent to the bearing. The oil supply unit includes a tank in which to accumulate lubricant, and a pump that receives the lubricant in the tank and supplies the lubricant to the bearing. The tank is provided with a holding material for the lubricant, the holding material having minute pores. The holding material includes a first holding portion provided in a region on an outlet-side of the tank, and a second holding portion provided in a part other than the region and having a porosity higher than that of the first holding portion.

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Kashiba, Japan

Boyko Stoimenov